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Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.288 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.288 ·

Remote session owner-only check reworked, with a remote cowork case added

The check for whether a remote session is limited to the owner's account is now shared, and a separate check for remote cowork sessions was added

Under the hood Internal Changes
JSON All of v2.1.288
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SessionsArea: what it touches
Internal ChangesKind: in v2.1.288,
Internal ChangesSection of the release
What

Some remote sessions only accept changes from the account that owns them. The check for this, used when handling MCP tool lists from the SDK, is now one shared piece of code instead of being written out in place. MCP servers are separate programs that give Claude extra tools, and the SDK is the kit for building programs on top of Claude Code. A separate check for remote_cowork sessions was added.

A new remote switch also came with this change. It is on unless it is switched off remotely.

Why

This reworks how remote sessions decide who is trusted to make changes.

Read from
Feature flag
tengu_calm_osprey On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.288: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

tengu_sdk_mcp_manifests On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.288: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.288. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat the new switch controls in anything you see is not clear.
The name it cites is new in this buildNew in this build: tengu_calm_osprey

See this entry in the whole of v2.1.288 →

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